Fix two warnings

Author: nikic

Zend/zend_builtin_functions.c

@@ -1388,12 +1388,11 @@ ZEND_FUNCTION(function_exists)
    Creates an alias for user defined class */
 ZEND_FUNCTION(class_alias)
 {
-	char *class_name, *lc_name, *alias_name;
+	char *class_name, *alias_name;
 	zend_class_entry **ce;
 	int class_name_len, alias_name_len;
 	int found;
 	zend_bool autoload = 1;
-	ALLOCA_FLAG(use_heap)
 
 	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss|b", &class_name, &class_name_len, &alias_name, &alias_name_len, &autoload) == FAILURE) {
 		return;

Zend/zend_compile.c

@@ -3985,7 +3985,7 @@ static int zend_traits_copy_functions(zend_function *fn TSRMLS_DC, int num_args,
 		}
 	}
 
-	lcname = hash_key->arKey;
+	lcname = (char *) hash_key->arKey;
 
 	if (exclude_table == NULL || zend_hash_find(exclude_table, lcname, fnname_len, &dummy) == FAILURE) {
 		/* is not in hashtable, thus, function is not to be excluded */